EMIR: cryogenic NIR multi-object spectrograph for GTC

Balcells, M.; Guzmán, R.; Patrón, J.; Aragón-Salamanca, Alfonso; Azcue, Joaquín; Lluch, Jose Alberto Ballester; Barroso, M. T.; Beigbeder, F.; Brau-Nogué, Sylvie; Cardiel, N.; Carter, Dave; Diaz-Garcia, Jose J.; Fuente, Eduardo de la; Fuentes, F. J.; Fragoso-Lopez, Ana Belen; Gago, Fernando; Gallego, J.; Gómez‐Elvira, Javier; Heredero, J. C.; Jones, Damien; López, José Carlos; Luke, Peter; Manescau, A.; Muñoz, Tamara; Peletier, Reynier F.; Pelló, R.; Picat, J. P.; Robertson, David J.; Rodriguez, J.; Serrano, Ángel; Sharples, R. M.; Zamorano, J.

doi:10.1117/12.395538

Cited by 9 publications

(2 citation statements)

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“…We observed AT2021lwx on MJD 59931 and MJD 59949 (𝑡 max + 320 d and 𝑡 max + 329 d respectively) with the Espectrógrafo Multiobjeto Infra-Rojo (EMIR, Balcells et al 2000) Both epochs used a 1.0" slit. Image rectification, dark and flat fielding, sky subtraction, dither combination, and wavelength calibration were performed using PyEMIR (Pascual et al 2010;Cardiel et al 2019) v0.17.…”

Section: Near Infra-red Spectroscopymentioning

confidence: 96%

Multiwavelength observations of the extraordinary accretion event AT2021lwx

Wiseman,

Wang,

Hönig

et al. 2023

Preprint

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We present observations from X-ray to mid-infrared wavelengths of the most energetic non-quasar transient ever observed, AT2021lwx. Our data show a single optical brightening by a factor > 100 to a luminosity of 7 × 10 45 erg s −1 , and a total radiated energy of 1.5 × 10 53 erg, both greater than any known optical transient. The decline is smooth and exponential and the ultra-violet -optical spectral energy distribution resembles a black body with temperature 1.2 × 10 4 K. Tentative X-ray detections indicate a secondary mode of emission, while a delayed mid-infrared flare points to the presence of dust surrounding the transient. The spectra are similar to recently discovered optical flares in known active galactic nuclei but lack some characteristic features. The lack of emission for the previous seven years is inconsistent with the short-term, stochastic variability observed in quasars, while the extreme luminosity and long timescale of the transient disfavour the disruption of a single solar-mass star. The luminosity could be generated by the disruption of a much more massive star, but the likelihood of such an event occurring is small. A plausible scenario is the accretion of a giant molecular cloud by a dormant black hole of 10 8 − 10 9 solar masses. AT2021lwx thus represents an extreme extension of the known scenarios of black hole accretion.

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Section: Near Infra-red Spectroscopymentioning

confidence: 96%

Multiwavelength observations of the extraordinary accretion event AT2021lwx

Wiseman,

Wang,

Hönig

et al. 2023

Preprint

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“…The main scientific driver of EMIR is the extension of the study of distant galaxies up to the z = 2 − 3 redshift regime, where the rest-frame visible spectrum features are shifted to the K-band. EMIR will also allow the analysis of other kind of objects, such as dust-enshrouded star formation regions, low-mass stars and distant clusters of galaxies, among others (see 1 for a more detailed description).…”

Section: Introductionmentioning

confidence: 99%

Data Reduction Pipeline for EMIR; a near-IR multiobject spectrograph for the Spanish 10m telescope

Gallego¹,

Cardiel²,

Serrano³

et al. 2002

SPIE Proceedings

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EMIR (Espectrógrafo Multiobjeto Infrarrojo) is a near-infrared wide-field camera and multi-object spectrograph to be built for the 10.4m Spanish telescope (Gran Telescopio Canarias, GTC) at La Palma. The Data Reduction Pipeline (DRP), which is being designed and built by the EMIR Universidad Complutense de Madrid group, will be optimized for handling and reducing near-infrared data acquired with EMIR. Both reduced data and associated error frames will be delivered to the end-users as a final product.

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